/ Dictionary / Index M milliradian: Meaning and Definition of Find definitions for: mil•li•ra•di•an Pronunciation: (mil'u-rā"dē-un), [key] — n. one thousandth of a radian. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: milliradian (Thesaurus) millipede millirem Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language